Change interface name “eth0″ in CentOS 7

Change the default network interface name to “eth0″


CentOS7 has a default nic name as “en016…..”, like this. To change it back to the default network device name like “ethX”, edit the grub file:


# vi /etc/default/grub

Search for the line “GRUB_CMDLINE_LINUX” and append the following: “net.ifnames=0 biosdevname=0″


GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"
GRUB_DEFAULT=saved
GRUB_DISABLE_SUBMENU=true
GRUB_TERMINAL_OUTPUT="console"
GRUB_CMDLINE_LINUX="vconsole.font=latarcyrheb-sun16 vconsole.keymap=us rd.lvm.lv=centos/root crashkernel=auto rhgb quiet"
GRUB_DISABLE_RECOVERY="true"

Then it Will look like this:


GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"
GRUB_DEFAULT=saved
GRUB_DISABLE_SUBMENU=true
GRUB_TERMINAL_OUTPUT="console"
GRUB_CMDLINE_LINUX="vconsole.font=latarcyrheb-sun16 vconsole.keymap=us rd.lvm.lv=centos/root crashkernel=auto rhgb quiet net.ifnames=0 biosdevname=0"
GRUB_DISABLE_RECOVERY="true"



Create a new configuration based on the currently running system using grub2-mkconfig command:
# grub2-mkconfig -o /boot/grub2/grub.cfg



Rename the interface files by renaming the file “/etc/sysconfig/network-scripts/ifcfg-en01…“
# sudo mv /etc/sysconfig/network-scripts/ifcfg-eno16777736 /etc/sysconfig/network-scripts/ifcfg-eth0

Reboot the system:

# reboot


After reboot, check the interface name:

# ifconfig

eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.1.100 netmask 255.255.255.0 broadcast 192.168.58.255
inet6 fe80::20c:29ff:fe6e:b0ae prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:6e:b0:ae txqueuelen 1000 (Ethernet)
RX packets 25336 bytes 2829386 (2.6 MiB)
RX errors 0 dropped 11 overruns 0 frame 0
TX packets 172 bytes 35789 (34.9 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0